{"id":356,"date":"2018-12-22T21:50:23","date_gmt":"2018-12-22T12:50:23","guid":{"rendered":"http:\/\/pobimath.synology.me\/wordpress\/?p=356"},"modified":"2018-12-22T22:20:08","modified_gmt":"2018-12-22T13:20:08","slug":"1%ea%b6%8c_%eb%aa%85%ec%a0%9c-9-%ea%b0%81%ec%9d%84-%ec%9d%b4%eb%93%b1%eb%b6%84%ed%95%98%eb%9d%bc","status":"publish","type":"post","link":"http:\/\/pobimath.synology.me\/wordpress\/archives\/356","title":{"rendered":"1\uad8c_\uba85\uc81c 9 \uac01\uc744 \uc774\ub4f1\ubd84\ud558\ub77c"},"content":{"rendered":"<blockquote><p><b><a href=\"http:\/\/aleph0.clarku.edu\/~djoyce\/java\/elements\/bookI\/propI9.html\">Proposition 9.<\/a><\/b><\/p>\n<p>To bisect a given rectilinear angle.<\/p>\n<p>\uc9c1\uc120\uc774 \ub9cc\ub098\uc11c \uc774\ub8e8\ub294 \uac01\uc744 \uc774\ub4f1\ubd84 \ud560 \uc218 \uc788\ub2e4.<\/p><\/blockquote>\n<p>$\\angle{BAC}$\uc744 \uc774\ub4f1\ubd84 \ud558\uc790.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-medium wp-image-357\" src=\"http:\/\/pobimath.synology.me\/wordpress\/wp-content\/uploads\/2018\/12\/Euclid_proposition_09-300x225.png\" alt=\"\" width=\"300\" height=\"225\" srcset=\"http:\/\/pobimath.synology.me\/wordpress\/wp-content\/uploads\/2018\/12\/Euclid_proposition_09-300x225.png 300w, http:\/\/pobimath.synology.me\/wordpress\/wp-content\/uploads\/2018\/12\/Euclid_proposition_09.png 498w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>\uc9c1\uc120 $AB$ \uc704\uc5d0 \uc801\ub2f9\ud55c \uc810 $D$\ub97c \uc7a1\ub294\ub2e4.<\/p>\n<p>\uc9c1\uc120 $AC$ \uc704\uc5d0 \uc120\ubd84 $AD$\uc640 \uac19\uc740 \uc120\ubd84\uc73c\ub85c \uc790\ub974\ub294 \uc810 $E$\ub97c \uc7a1\ub294\ub2e4.<\/p>\n<p>\uc120\ubd84 $DE$\ub97c \ud55c \ubcc0\uc73c\ub85c \ud558\ub294 \uc815\uc0bc\uac01\ud615\uc744 \uc791\ub3c4\ud55c\ub2e4.<\/p>\n<p>$\\overline{AD}=\\overline{AE}$, $\\overline{AF}$\ub294 \uacf5\ud1b5, $\\overline{DF}=\\overline{EF}$<\/p>\n<p>\uba85\uc81c 9\uc5d0 \ub530\ub77c SSS\ud569\ub3d9\uc774\ub2e4.<\/p>\n<p>$$\\triangle{ADF}\\equiv \\triangle{AEF}$$<\/p>\n<p>$$\\therefore\\;\\;\\angle{DAF}=\\angle{EAF}$$<\/p>\n<p style=\"text-align: left;\">\ub530\ub77c\uc11c \uc9c1\uc120 $AF$\ub294 $\\angle{BAC}$\uc744 \uc774\ub4f1\ubd84 \ud55c\ub2e4.<\/p>\n<p style=\"text-align: right;\">\n$\\blacksquare$<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Proposition 9. To bisect a given rectilinear angle. \uc9c1\uc120\uc774 \ub9cc\ub098\uc11c \uc774\ub8e8\ub294 \uac01\uc744 \uc774\ub4f1\ubd84 \ud560 \uc218 \uc788\ub2e4. $\\angle{BAC}$\uc744 \uc774\ub4f1\ubd84 \ud558\uc790. \uc9c1\uc120 $AB$ \uc704\uc5d0 \uc801\ub2f9\ud55c \uc810 $D$\ub97c \uc7a1\ub294\ub2e4. \uc9c1\uc120 $AC$ \uc704\uc5d0 \uc120\ubd84 $AD$\uc640 \uac19\uc740 \uc120\ubd84\uc73c\ub85c \uc790\ub974\ub294 \uc810 $E$\ub97c \uc7a1\ub294\ub2e4. \uc120\ubd84 $DE$\ub97c \ud55c \ubcc0\uc73c\ub85c \ud558\ub294 \uc815\uc0bc\uac01\ud615\uc744 \uc791\ub3c4\ud55c\ub2e4. $\\overline{AD}=\\overline{AE}$, $\\overline{AF}$\ub294 \uacf5\ud1b5, $\\overline{DF}=\\overline{EF}$ \uba85\uc81c 9\uc5d0 \ub530\ub77c SSS\ud569\ub3d9\uc774\ub2e4. $$\\triangle{ADF}\\equiv \\triangle{AEF}$$ $$\\therefore\\;\\;\\angle{DAF}=\\angle{EAF}$$ &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/pobimath.synology.me\/wordpress\/archives\/356\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;1\uad8c_\uba85\uc81c 9 \uac01\uc744 \uc774\ub4f1\ubd84\ud558\ub77c&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/posts\/356"}],"collection":[{"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/comments?post=356"}],"version-history":[{"count":2,"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/posts\/356\/revisions"}],"predecessor-version":[{"id":360,"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/posts\/356\/revisions\/360"}],"wp:attachment":[{"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/media?parent=356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/categories?post=356"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/pobimath.synology.me\/wordpress\/wp-json\/wp\/v2\/tags?post=356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}